gazetteerpanel.java

world wind java sdk 源码

/*
Copyright (C) 2001, 2006 United States Government
as represented by the Administrator of the
National Aeronautics and Space Administration.
All Rights Reserved.
*/
package gov.nasa.worldwind.examples;

import gov.nasa.worldwind.WorldWindow;
import gov.nasa.worldwind.exception.NoItemException;
import gov.nasa.worldwind.geom.*;
import gov.nasa.worldwind.geom.Position;
import gov.nasa.worldwind.globes.Globe;
import gov.nasa.worldwind.poi.*;
import gov.nasa.worldwind.view.*;
import org.xml.sax.SAXException;

import javax.swing.*;
import javax.swing.text.*;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPathExpressionException;
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.regex.*;

/**
 * @author tag
 * @version $Id: GazetteerPanel.java 9192 2009-03-05 20:17:36Z tgaskins $
 */
public class GazetteerPanel extends JPanel
{
    private final WorldWindow wwd;
    private Gazetteer gazeteer;
    private JPanel resultsPanel;
    private JComboBox resultsBox;

    public GazetteerPanel(final WorldWindow wwd, String gazetteerClassName)
        throws IllegalAccessException, InstantiationException, ClassNotFoundException
    {
        super(new BorderLayout());

        if (gazetteerClassName != null)
            this.gazeteer = this.constructGazetteer(gazetteerClassName);
        else
            this.gazeteer = new YahooGazetteer();

        this.wwd = wwd;

        // The label
        URL imageURL = this.getClass().getResource("/images/32x32-icon-earth.png");
        ImageIcon icon = new ImageIcon(imageURL);
        JLabel label = new JLabel(icon);
        label.setBorder(BorderFactory.createEmptyBorder(0, 15, 0, 15));

        // The text field
        final JTextField field = new JTextField("Name or Lat,Lon?");
        field.addActionListener(new ActionListener()
        {
            public void actionPerformed(final ActionEvent actionEvent)
            {
                EventQueue.invokeLater(new Runnable()
                {
                    public void run()
                    {
                        try
                        {
                            handleEntryAction(actionEvent);
                        }
                        catch (NoItemException e)
                        {
                            JOptionPane.showMessageDialog(GazetteerPanel.this,
                                "Location not available \"" + (field.getText() != null ? field.getText() : "") + "\"\n"
                                    + "(" + e.getMessage() + ")",
                                "Location Not Available", JOptionPane.ERROR_MESSAGE);
                        }
                        catch (IllegalArgumentException e)
                        {
                            JOptionPane.showMessageDialog(GazetteerPanel.this,
                                "Error parsing input \"" + (field.getText() != null ? field.getText() : "") + "\"\n"
                                    + e.getMessage(),
                                "Lookup Failure", JOptionPane.ERROR_MESSAGE);                  
                        }
                        catch (Exception e)
                        {
                            e.printStackTrace();
                            JOptionPane.showMessageDialog(GazetteerPanel.this,
                                "Error looking up \"" + (field.getText() != null ? field.getText() : "") + "\"\n"
                                    + e.getMessage(),
                                "Lookup Failure", JOptionPane.ERROR_MESSAGE);
                        }
                    }
                });
            }
        });

        // Enclose entry field in an inner panel in order to control spacing/padding
        JPanel fieldPanel = new JPanel(new BorderLayout());
        fieldPanel.add(field, BorderLayout.CENTER);
        fieldPanel.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 15));

        // Put everything together
        this.add(label, BorderLayout.WEST);
        this.add(fieldPanel, BorderLayout.CENTER);

        resultsPanel = new JPanel(new GridLayout(1,2));
        resultsPanel.add(new JLabel("Results: "));
        resultsBox = new JComboBox();
        resultsBox.addActionListener(new ActionListener()
        {
            public void actionPerformed(final ActionEvent actionEvent)
            {
                EventQueue.invokeLater(new Runnable()
                {
                    public void run()
                    {
                        JComboBox cb = (JComboBox)actionEvent.getSource();
                        PointOfInterest selectedPoi = (PointOfInterest)cb.getSelectedItem();
                        moveToLocation(selectedPoi);
                    }
                });
            }
        });
        resultsPanel.add(resultsBox);
        resultsPanel.setVisible(false);
        this.add(resultsPanel, BorderLayout.EAST);
    }

    private Gazetteer constructGazetteer(String className)
        throws ClassNotFoundException, IllegalAccessException, InstantiationException
    {
        if (className == null || className.length() == 0)
        {
            throw new IllegalArgumentException("Gazetteer class name is null");
        }

        Class c = Class.forName(className.trim());
        Object o = c.newInstance();

        if (!(o instanceof Gazetteer))
            throw new IllegalArgumentException("Gazetteer class name is null");

        return (Gazetteer) o;
    }

    private void handleEntryAction(ActionEvent actionEvent) throws IOException, ParserConfigurationException,
        XPathExpressionException, SAXException, NoItemException, IllegalArgumentException
    {
        String lookupString = null;

        //hide any previous results
        resultsPanel.setVisible(false);
        if (actionEvent.getSource() instanceof JTextComponent)
            lookupString = ((JTextComponent) actionEvent.getSource()).getText();

        if (lookupString == null || lookupString.length() < 1)
            return;

        java.util.List<PointOfInterest> poi = parseSearchValues(lookupString);

        if (poi != null)
        {
            if (poi.size() == 1)
            {
                this.moveToLocation(poi.get(0));
            }
            else
            {
                resultsBox.removeAllItems();
                for ( PointOfInterest p:poi)
                {
                    resultsBox.addItem(p);
                }
                resultsPanel.setVisible(true);
            }
        }
    }

    /*
    Sample imputs
    Coordinate formats:
    39.53, -119.816  (Reno, NV)
    21 10 14 N, 86 51 0 W (Cancun)
    -31